Pump



' F. s.' ABBOTT Oct. 3, 1950 PUMP Filed NQv. 15, 1946 Patented Oct. 3,1950 PUMP Furman S. Abbott, Montclair, N. J., assigner to Airkem,` Inc.,New York, N. Y., a corporation of New York Application November i3,1946, seriaiNo. 709,450

(o1. ioswss) e oisans.

l o The present invention relates to pumps `of the pistonor plunger typeand-.'for convenience, it will be identied as being of the piston typewith the intent that that term be understood to include within its scopeplunger pumpstrucdelivery of certain amounts of liquid determined by thenumber of strokes, and in which the length of stroke can bereadily'varied to vary the amount of Vdelivery per stroke, whilepermitting simple adjustment of pump Structure to adapt it to supn plyreservoirs of diferent depths. 'I g More specific objects of theinvention' are to provide in such pump mechanism simple working parts soassociated that a pulse of liquid is delivered from a discharge tubethrough a hollow valved piston bya stroke motion thereon' of a cylindersleeve effectively' connected by a pull.- ing member, suchY as a wire rrod, easily ade justed in length, connected to the moving member of anelectrical motive means so that each energization of the latter willeffect one pump stroke, which may be in the form of a plunger coresolenoid, the mechanical pump structure as well as its operatingelectrical motive means preferably being adjustably mounted onsupporting structure so that the pump stroke may be easily varied atwill and the pump can be adapted to eiiicient withdrawal of substantialportions of contained liquid-from reservoirs of diiierent depths. v o

A further object ofthe present invention isto provide a structuralembodiment of the pump Vinvention which is readily constructedandpermits efficient use and operation thereof.

Other objects `of the invention Y.willgin ,part be obvious and will inpart appear hereinafter.

The invention accordingly comprises the features of construction,combination of elements and arrangement of parts, which will beexemplied in tlieconstruction hereinafter set forth, and the scope ofthe invention will be indicated in the claims. i e

For a fuller understanding of the nature and objects of the invention,referenceshou'ld be had to the following detailed description taken inconnection with the accompanying drawing, in

which: Y

Fig. 1 is 4an elevational perspective of a-n eml bodirnent of the pumpof the present invention showing it associated with a supply reservoiror container and with its discharge pipe leading to a vaporizerindicated in dotted lines which may be employed for converting pumpliquid to vapors and mixing or diffusing the latter into passingcurrents of gaseous medium, such as air; Fig. 2 is an enlargedelevational section of the pump embodiment and associated supplyreservoir shown in` Fig. l, with parts broken away;

Fig. 3 is an enlarged elevational section tota still larger scaleshowing details of construction of certain pump mechanism of Fig. 2,with the parts of the pump mechanism positioned fora pumping stroke; Y

Fig. 4 is a View similar to Fig. 3 of the struc4A ture shown therein butwith the parts thereof in different positions es assumed aft-.er apumping stroke; Y Y 1 Fig. 5 is a fragmentary elevational perspective,`with parts broke-neway, of an operating element of the pumpstructureshown in Figs. 3V and4'; .and f Mig. 6 is a sectional view,with' parts broken `away, taken substantially on line ii-i of Fig., l2".

Y An'embodiment of the pump of, the present invention is shown, by wayof example, in the accompanying drawing, in which like numerals.identify similar parts throughout. As therein shown pump unit 3Spreferably includes a pump supporting plate 2l2 on which a bracket 2I3isfixed. A yoke 214 is secured to bracket 2 l 3 by any suitable means,suchas screws 215, 2I5. The yokeV 2M supportsv a solenoid '59, winding2HE. of

` which is connected to circuitV conductors Tl and 13 so that whenpoweris supplied therethrough thesolenoid will -be energized. Solenoid` 1.9-isof the plunger core type having plunger Badapted to be lifted whenthe solenoid is energized.` A `bumper 2H, preferably in the form of arubber block, is mounted on the base plate 2 l2 beneath the plunger coretatoj assure quiet operation;v

PumpiloracketY 2434 also supports outlet tube M which extends downwardlyfor` access to liquid, such as body -i in acontainer Zig on whichpumpbase plate 212 may rest and be secured 223 having an axially locatedinlet hole 224. The inlet hole 224 is valved, preferably by a ball 225seating down against the end wall or head 223 to close off the hole 224.A helical biasing spring 226 is held under Stress between the reducedend section 22| of tube 4| and the ball 225.

A pump cylinder 221 is closely fitted about piston 222 for relativesliding movement. The lower end of pump cylinder 221 is fitted with ahead block 223 having an axial inlet hole 229 therein closed off by agravity-biased check valve ball 230. The head block 228 is held inposition in the lower end of cylinder sleeve 221 by means of a screen23| which seats against a circular shoulder 232 in the cylinder sleevewith the edge 233 of the cylinder sleeve crimped inwardly to hold thescreen in position. The cylinder sleeve 221 is to be reciprocated up anddown relative to the hollow piston 222, and for this purpose a verticalrod or pull wire 234 has its upper end bent laterally at 235 to providea hook to be received in a transverse hole in the plunger core 80.Thecore material below the transverse hole or the bottom side of thelatter forms an upwardly facing abutment over which the rod hookisengaged. The pump operating wire or rod 234 is provided at its lowerend with a spring clip 2`3| which is mounted in a circumferential groove231 in the external surface of cylinder sleeve 221 by snap engagement.The downwardly facing shoulder formed by the upper edge of the grooveforms a clip-engaging abutment. Clip 236is preferably formed by bendingthe lower end of wire 234 back upon itself, as shown.

Preferably pump housing 31 is mounted on supporting base 2I2 and thecontainer 2I9 is provided with a cover 38 having a vertical sight slot39 therein and a plurality of supporting feet 4(1-49 having lateralextensions 238-238 to support the bottom of the container 2|9. A coverplate 239 is provided for the casing 38 and has a hole 240 therein whichreceives the pump housing 31.

In many cases it is desirable to adjust the stroke of the'pump so as toassure delivery of a certain predetermined amount of liquid with eachpulse or on each pump stroke, and also to adjust the elevation of thepump mechanism to 'adapt the pump to supply containers of differentsizes. For this purpose it is preferable to provide for support bracket2 I3 separate means for clamping the discharge tube 4I thereto andmounting the solenoid supporting bracket 2I4 thereon. Accordingly, thedischarge tube 4| lmay be clamped to the mounting bracket 2 I3 by meansof a plate 24!) fastened to the bracket by ,screws 24|, 24|, as shown inFigs. 2 and 6. This means may thus be employed to adjust the verticalposition of the discharge tube 4| irrespective of the solenoid mount andso that the bottom end Aof the discharge tube, where the working partsof the 'pump are located, may be positioned substantially at the bottomof the container 2 I9 for most effective withdrawal of substantially allof the liquid therein.

, Further, adjustment of the Ystroke of the pump, to vary the volume ofdischarge, may be lreadily attained with provision of sets of holes inthe solenoid bracket 2 I4 in addition to those in which Vthe mountingscrews 2I5, 2I5 are shown encore resting on the bumper 2|1, and theupward position of the core when the solenoid is energized. Of course itwill be understood that the mounting of solenoid bracket 2|4 is in onerespect similar to that of the clamp bracket 240, with the screws 2I5, 2I5, the holes in the bracket in which they are engaged and theadditional set of holes 242, 242, duplicated on the far side ofsupporting bracket 2| 3 and the discharge tube 4| as the structure isviewed in Fig. 2. Further variation in the stroke of the pump may beobtained by providing bumper blocks at 2|1 of different heights.

In operation of the pump unit shown in Figs. 1 to 6, inclusive, whenwires 11 and 18 are connected to a power input circuit having acircuitclosing switch therein, the pump may be caused to operate onestroke by closure of the switch to deliver a single pulse of liquid.

With closure of the switch the winding 2I6 of the solenoid 19 isenergized so that the core plunger 80 is quickly pulled upwardly. Thepump operating rod or pull wire 234 is lifted with the plunger core 80so as to lift the pump cylinder sleeve 221. With the pump primed, asshown in Fig. 3, lifting of the cylinder sleeve 221 will developincreased pressure in the cylinder below the piston 222, since the valveball 23D closes off the inlet passage 229. Eventually this internalpressure becomes greater than the biasing force of spring 226 and valveball 225 is forced upwardly to open piston passage 224. When theinternal pressure in the cylinder sleeve 221 is relieved by this upwardpassage of liquid, the biasing force of spring 225 re-seats valve ball225 and the pump parts assume the relative positions shown in Fig. 4.The liouid from the cylinder sleeve 221 passes upwardly through thehollow piston 222 into and through the outlet tube 4| in the form of aspurt of pulse thereof. When the solenoid is de-energized by breakingthe power supply circuit of its winding, force of gravity pulls plungercore B0, operating rod 234 and pump cylinder sleeve 221 downwardly backto their relative starting positions shown in Figs. 2 and 3. The pumpparts will then be in their initial positions ready for another stroke.

This pump may be employed successfully to deliver spurts or pulses ofliquid, such as a deodorant or air-freshening liquid, to any suitablediffusing means, such as a vaporizer structure in.- dicated in dottedlines in Fig. l. For example. such a vaporizer structure may comprise ahood 43 having louvered inlet openings [l5- 45 and an outlet opening inthe back side thereof (not shown) through which air currents may bedrawn to pick up vapors of the liquid pumped to the vaporizer. For thispurpose the outlet tube 4| of the pump may be connected by a conduit 44to any suitable spray head (not sho-wn) located within thevaporizercasing or hood 43.

It will thus be seen that the objects set forth above, among others madeapparent from the preceding description, are efficiently attained and,since certain changes may be made in the above construction anddifferent embodiments of the invention could be made without departingfrom the scope thereof, it is intended that all matter contained in theabove description or shown in the accompanying drawing shall beinterpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended tocover all of the generic and specic features of the invention hereindescribed, and all statements of the scope of the invention which, as amatteroi language, might be Asaid to fall therebetween.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

1. A casingless pump comprising, in combination, an upwardly extendingdischarge tube having a lower intake portion, a hollow piston having itslower endconstitutingan intake head and its upper portion mountedconcentric of the lowerY intake portion of said tube and interiorlycommunicating only and directly with the latter, a downwardly-biasedcylinder reciprocatively Y mounted coaxially on saidpiston witliitslower end constituting an intake head', downwardlybiased valve means atthe intake heads' of said piston and cylinder adapted to open outwardlyfor valving passages therein, a downwardly-- biased upwardly-extendinglift member connected to said cylinder, and an electrical solenoid abovesaid cylinder having a liftable downwardlybiased upwardly-extendingplunger core connected to said liit member to exert upward pull thereonwhen lifted with energization of said so-lenoid the latterwhen energizedbeing adapted to lift said cylinder producing one stroke thereof andcausing a single pulse of liquid to be delivered Y from said dischargetube with said cylinder, lift member and plunger core being adapted tcfall together to stroke-starting position upon de-energization of saidsolenoid,

2. A casingless pump comprising, in combination, an upwardly extendingdischarge tube havf ing a lower intake portion, ahollow piston havingits lower end constituting an intake head and its upper portion mountedconcentric of the lower intake portion of said tube and interiorlycornmunicating only and directly with the latter, a downwardly-biasedcylinder reciprocatively mounted coaxially on said piston with its lowerend constituting an intake head, downwardlybiased valve means at theintake heads oi said piston and cylinder adapted to open upwardly forvalving passages therein, a lift member connected to said cylinder, anelectrical solenoid having a downwardly-biased plunger core connected tosaid lift member to exert upward pull thereon when said solenoid isenergized to lift said cylinder producing one stroke thereof and causinga single pulse of liquid to be delivered 'from said discharge tube,supporting means for said solenoid, stop means to limit the downwardmovement of said plunger core, and means to mount said solenoid to saidsupporting means in any one of a plurality of different elevationalpositions for adjustment of the pump stroke.

3. A casingless pump comprising, in combination, an upwardly extendingdischarge tube having a lower intake portion, a hollow piston having itslower end constituting an intake head and its upper portion mountedconcentric of the lower intake portion of said tube and interiorlycommunicating only and directly with the latter, a downwardly-biasedcylinder reciprocatively mounted coaxially on said piston with its lowerend constituting an intake head, downwardlybiased valve means at theintake heads of said piston and cylinder adapted to open outwardly forvalving passages therein, a lift member adjustable in length andconnected to said cylinder, an electrical solenoid having adownwardlybiased plunger core connected to said lift member to exertupward pull thereon when said solenoid is energized to lift saidcylinder producing one stroke thereof and causing a single pulse ofliquid to be delivered from said discharge tube,

adjustable supporting means for said discharge tube permitting variationin the elevational: position o-f the intake portion thereof, supportingmeans for said solenoid, stop means to limit the downward movement ofsaid plunger core, and means to mount said solenoid to-said supportingmeans in any one cf a plurality of diilerent'elevational positions foradjustment of' the pum-p stroke.

4. A casingless pump comprising, in combination, an upwardly extendingdischargeV tube having a lower intake portion, a hollow piston havingits lower end constituting an intake head and its upper portion mountedconcentric of the lower intake portion of said tube and interiorlycommunicating only and directly with the latter, a downwardly-biasedcylinder reciprocatively mounted coaxially on said piston with its lowerend constituting an intake head, downwardlybiased valve means at theintake heads of said piston and cylinder adapted to open upwardly forvalving passages therein, a lift member adjustable in length andconnected to said cylinder, an electrical solenoid having adownwardly-biased plunger core connected to said lift member to exertupward pull thereon when said solenoid is energized to lift saidcylinder producing one stroke thereof and causing a single pulse ofliquid to be delivered from said discharge tube, adjustable supportingmeans for said discharge tube permitting variation in the elevationallposition of the intake portion thereof, supporting means for saidsolenoid, stop means to limit the downward movement of said plungercore, said stop means having a core abutment adjustable in elevation tovary the pump stroke, and means to mount said solenoid to saidsupporting means in any one of a plurality of different elevationalpositions for adjustment of the `pump stroke.

5. A casingless pump comprising, in combination, a supporting structure,an upwardly extending discharge tube, means adjustably mounting saidtube to said supporting structure and permitting elevational adjustmentof the lower intake end of said tube, a hollow pistonintercommunicatively located at the lower intake end of said tube, adownwardly biased cylinder reciprocatively mounted on said piston, apair of downwardly biased valves mounted on the heads of said `pistonand cylinder and valving passages therein, a pull rod having a clip onits lower end snapped onto a reduced portion of the outer surface ofsaid cylinder, an electrical solenoid having a downwardly biased plungercore, means adjustably fastening said solenoid to said supportingstructure and permitting elevational adjustment thereof to vary the corestroke, a stop abutment on said supporting structure to limit downwardmovement of said core, and means removably connecting said core t0 saidrod to permit variation in the length of the latter.

6. A casingless pump comprising, in combination, a supporting structure,an upwardly extending discharge tube, clamp means mounting said tube tosaid supporting structure and permitting elevational adjustment of thelower intake end of said tube, a hollow cylindrical piston mounted onthe lower intake end of said tube in axial alignment and communicationtherewith, a piston head closing oi the lower end of said piston andhaving a valved passage, a downwardly biased cylinder sleevereciprocatively mounted `on said piston, a cylinder head closing off thelower end of said sleeve and having a valved passage, a

Ypair of downwardly biased valves mounted on the piston and sleeve headsand valving the passages therein, a pull Wire having a reversely bentportion at its lower end providing a spring clip snapped into a grooveinto the outer surface of said sleeve, an electrical solenoid having adoWn wardly biased plunger core, adjustable fastening means mountingsaid solenoid to said supporting structure and permitting elevationaladjustment thereof to vary the core and pump stroke, a bumper on saidsupporting structure to limit downward movement of said core, anupwardly facing abutment means on the lower end of said core, and a hookon the upper end of said pull wire engaged over said abutment means sothat as said core is lifted said Wire will lift said sleeve operatingthe pump one stroke and to :per-

mit variation in the length of said pull wire by reformation of saidhook. l

FURMAN S. ABBOTT.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS 10 Number Name Date Re. 12,331 Deis Mar. 28, 190597,382 Fuller Nov. 30, 1869 750,115 Orr Jan. 19, 1904 954,994 PetersenApr. 12, 1910 l5 2,253,122 Hamant Aug. 19, 1941 2,286,888 Arnold June16, 1942

